SLQ Wiki facilities:fablab:materials

Casting Materials

anonymous@undisclosed.example.com (Anonymous) — Mon, 23 Jul 2018 14:27:18 +0000

Casting Materials

Silicon Moulding

Greensil

Greensil is a 2 part putty (mixed 1:1 per volume) that has a working time of 8min and a demold time of 20min which is of particular use in a workshop scenario where time is an issue.

Process for using and selling greensil

What you need

Scales
2x smll poly bag (or 2 plastic cups)
2x paddlepop stick
clean space to work
form that you want to make impression mould of
time piece

Process 1. put a plastic cup (if its going to be used straight away ) or a poly bag (if they aren't using it immediately) )onto the scales and zero the scales 2. Dig out a potion of Part A ( white ) with a paddle pop stick and place it into/on the cup/ polybag

3. weigh out a the required portion min 10 grams of part A

4. Repeat with Part B (green) making sure you don't cross contaminate (use a different cup/polybag and paddle pop stick.

5. Record the amount taken from stock (10g) the date and your initials. Ensure lids are resealed

6. Charge for the amount provided using the online materials form http://edgeqld.org.au/materials-payment/

7. Mash the two parts together until they are mixed - if you can see streaks of white in the mix you need to keep mashing. You have up 6 min working time, so you need to get it mixed and make your impression in this time.

Press the form into the mixed putty. When you make your impression be mindful of how you will later use the cast.
After 20 min the putty should be cured and you can demould.

Silicon Casting

The Edge currently stocks 2 varieties of pour casting Silicone - Pinkysil and Banana Skin

But Before you can make a silicon casting you need something to contain the silicone. You want the container to be as small as possible so you don't have to pay for as much silicone. So we generally recommend making your own perfectly sized cardboard box.

Here's some basic instructions to make your box

You'll need:

* The item you want to cast.

some cardboard,
a cutting board,
a utility knife ( stanley)
a pen or pencil
a metal ruler
hot glue gun
-aybe some tape or rubberbands or clothes pegs

Instructions 1. With you pencil and ruler draw out out the size box base you want by placing the form you copying on you cardboard and draw a square (or other flat-sided polygon) around it. Remember the less space around your form the less silicone you need to use and the less CA$H M8-) NIE$ you need to pay. Of course don't go to overboard cause you don't want the form touching the side of your box.

2. Now draw the sides of you box radiating out from the straight sides of the base. Ensure you make these sides deep enough to contain enough silicone to cover your form. handy hint the box needs to be a little deeper that the object you are casting

You can see that i have added some flaps to each of the vertical sides of the box, this will give you something fold over and glue the sides together.

3. Now carefull score (slightly cut) the fold lines of your box (straight lines round the base and fold lines for flaps)

you can use a rubber band, tape or a pegs to hold your box in shape

4. Now put a dab of hot glue on the inside of each of you tabs

And if you like bed of hot down the joins to seal these.

5. When you pour your silicone cast you don't want the original form floating around in the curing silicone. So most people blutac down, or find another method securing the form to the bottom of you containing box. Be careful though that you have you original form oriented correctly.

You are now ready to start preparing your silicone

Process for using and selling Pinkysil or Banana Skin

What you need

2x 30ml Syringes
1x plastic cup (for mixing)
1x paddlepop stick (for mixing)
clean space to work
form that you want to make impression mould of
Container ( the box you just made)
time piece
Parts A and B of Pinkysil or Banana Skin

Instructions

1. Lay out all of your equipment and consumables on a clean workspace.

2. Shake Part A and Part B bottles vigorously for 30 sec.

3. guestimate (in mL) what volume casting silicone you will require. Half this and then add a bit for good luck.

4. using a 30mL syringe, measure out the required portion that is required of Part A (Pink / Yellow) and place this in you plastic mixing cup.

Ensure the lid is resealed correctly.

5. With another 30mL syringe, Repeat step 3 with Part B (clear).

Do not cross-contaminate the two parts by reusing the same syringe. Ensure the lid is resealed correctly.

6. Place Part B in the Mixing cup with part A and stir with a paddlepop stick.

7. Pour well mixed silicone solution over the form that you have secured at the bottom of the container.

8. Record the amount taken from stock (10g), the date and your initials.

9. Charge for the amount provided using the online materials form http://edgeqld.org.au/materials-payment/

After 20 min the silicone should be cured and you can demould.

Casting Materials

EasyCast

CNC Materials

anonymous@undisclosed.example.com (Anonymous) — Mon, 23 Jul 2018 14:27:18 +0000

CNC Materials

This section contains information around the use of materials for use with the CNC.

Plywood

Standard plywood supplied is 1200 x 1200mm (half-sheet) CD grade ply, thickness 15mm.

Expanded Foam

Expanded Foam can be cut with the router, but requires finishing by hand for an acceptable smooth finish.

Finishing

It seems that expanded foam has a “grain” in it. If you sand the wrong way it can tear up the foam. Make sure to find the direction of the the foam for smooth sanding results. Fine grade sandpaper works wonders.

If you need to use hole cutters after being used in the CNC make sure it is fine-tooted otherwise the foam will tear.

Hot glue works with the material but try to avoid if possible as the tip of the hot glue gun can damage the material (Bosch). Lower heat glue guns will work better than the Bosch ones. Using Steel Tough Wellbond Universal Adhesive works great with the material and reduces the chance to damage the foam. It dries clear.

3D Printer Filament

anonymous@undisclosed.example.com (Anonymous) — Wed, 06 Nov 2019 15:35:12 +0000

3D Printer Filament

All materials need to be tested to make sure they are safe to use in The Edge's 3D Printers. Different materials can cause damage to the equipment and can be hazardous to the health and safety of the operator and other people in the Fabrication Lab.

All participants completing a 3D Printer induction are informed of the Edge's policy that all new materials need to be approved before use in the 3D Printers.

Users of the 3D Printers can apply 14 days in advance to use a new material and are asked to provide a sample of the material and MSDS sheets pertaining to the material and any other treatments applied to the material.

All new material must be used with active extraction or in a large, well ventilated space.

All PLA will be eSun branded and purchased through a reputable supplier. Lab users can discuss with Applied Creativity staff members whether a particular supplier is suitable.

Materials Shop

anonymous@undisclosed.example.com (Anonymous) — Sat, 03 Aug 2024 14:03:18 +0000

Materials Shop

State Library provides a range of off the shelf material/consumables for purchase in the Fabrication Lab.

If you wish to purchase materials externally and bring them in to use with The Edge laser cutters, please email appliedcreativity@slq.qld.gov.au with any SDS (safety data sheets) or to speak to our lab supervisors about your options.

Material Prices

Material	Thickness	Colour	Size	Price
3D Printer Filament (PLA+)	Ø1.75mm	Various	NA	free within reason then 15c/gram
Acrylic	6mm	Clear	~A2	$ 28.00/sheet
	4.5mm	Clear	~A2	$25.00/sheet
	3mm	Clear	~A2	$ 17.00/sheet
	3mm	White	~A2	$ 17.00/sheet
	3mm	Black	~A2	$ 17.00/sheet
	3mm	Coloured/Glitter/Mirrored	~A2	$28.50/sheet
	1.5mm	Clear	~A2	$ 16.00/sheet
Polypropylene	0.6mm	Various	~A2	$ 4.00/sheet
PETG	0.75mm	Clear	-A2	$16.00/sheet
Plywood (E0 Interior Grade Hoop Pine)	6.5mm		~A2	$ 14.00/sheet
	4mm		~A2	$ 10.00/sheet
Box Board (Dense)	1.3mm/750gsm		~A2	$18.00/sheet
	2.4mm		~A2	$22.00/ sheet
Presentation Board	1.3mm/1000gsm	White & Black	~A2	$7.00/sheet
Stamp Material (rubber)	~3mm		~A4	$15.00/sheet
Corrugated Cardboard	Single & double	400 x 600		$1.00/sheet
Signwriters Vinyl Film		Black or White	600mm	$8.00/m
		Colour	600mm	$10.00/m
Application Tape	Low Tac		600mm	$4.00/m
Magnetic material	1.3mm	Various	A4	$15/sheet